package com.lagou.web.servlet;

import com.lagou.base.Constants;
import com.lagou.pojo.Course;
import com.lagou.service.CourseService;
import com.lagou.service.impl.CourseServiceImpl;
import com.lagou.utils.DateUtils;
import com.lagou.utils.UUIDUtils;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@WebServlet("/courseSalesInfo")
public class CourseSalesInfoServlet extends HttpServlet {
    /**
     * 保存课程营销信息
     * 收集表单数据,封装到course对象中,将图片上传到tomcat服务器中
     */
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        try {
            //1.创建Course对象
            Course course = new Course();
            //2.创建map集合,用来收集数据
            Map<String, Object> map = new HashMap<>();
            //3.创建磁盘工厂对象
            DiskFileItemFactory factory = new DiskFileItemFactory();
            //4.文件上传核心对象
            ServletFileUpload fileUpload = new ServletFileUpload(factory);
            //5/解析request对象,获取表单集合
            List<FileItem> list = fileUpload.parseRequest(req);
            //6.遍历集合 判断哪些是普通表单项,哪些是文件表单项
            for (FileItem fileItem : list) {
                boolean formField = fileItem.isFormField();
                if (formField) {
                    //普通表单项,获取表单项中的数据,保存到map;
                    String fieldName = fileItem.getFieldName();
                    String value = fileItem.getString("utf-8");
                    System.out.println(fieldName + " " + value);
                    map.put(fieldName, value);
                } else {
                    //文件上传项
                    //获取文件名
                    String fileName = fileItem.getName();
                    String newFileName = UUIDUtils.getUUID() + " " + fileName;
                    //获取输入流
                    InputStream in = fileItem.getInputStream();
                    String realPath = this.getServletContext().getRealPath("/");
                    System.out.println(realPath);
                    String webappsPath = realPath.substring(0, realPath.indexOf("lagou_edu_home"));

                    //创建输出流
                    OutputStream out = new FileOutputStream(webappsPath + "upload/" + newFileName);
                    System.out.println(webappsPath);
                    IOUtils.copy(in, out);
                    //关闭流
                    out.close();
                    in.close();
                    //将图片路径进行保存
                    map.put("course_img_url", Constants.LOCAL_HOST + "/upload/" + newFileName);

                }

            }
            //使用BeanUtils 将Map中的数据封装到course对象
            BeanUtils.populate(course, map);
            String strDate = DateUtils.getDateFormart();
            CourseService courseService = new CourseServiceImpl();
            //判断是是修改操作还是添加操作
            if (map.get("id") != null) {
                //补全信息
                course.setUpdate_time(strDate);//修改时间
                String result = courseService.updateCourseSalesInfo(course);
                resp.getWriter().println(result);
            } else {
                // 新建操作
                //补全信息
                course.setCreate_time(strDate);//创建时间
                course.setUpdate_time(strDate);//修改时间
                course.setStatus(1);//上架
                //业务处理
                String result = courseService.savaCourseSalasInfo(course);
                //响应结果
                resp.getWriter().println(result);
            }
            //补全信息


        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
